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From: cyborg@kauri.vuw.ac.nz (Alex Ivopol)
Newsgroups: sci.electronics
Subject: programming EPROMS
Message-ID: <1991May26.231046.28772@comp.vuw.ac.nz>
Date: 26 May 91 23:10:46 GMT
Sender: news@comp.vuw.ac.nz (News Admin)
Organization: Victoria University of Wellington, New Zealand
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Nntp-Posting-Host: kauri.vuw.ac.nz

A freshly erased EPROM has all the bits set to 1, programming involves
clearing some of the bits. Could someone please explain to me why the
EPROM needs such high voltage (12.5, 21 or even 25 volts) just to erase
certain bits. How exactly is this voltage used in the EPROM to erase bits ?

Thanx in advance,
--
Alex T. Ivopol                       Contracted by Computing Services Centre,
cyborg@kauri.vuw.ac.nz                  Victoria University of Wellington,
This is MY opinion, not my employer's.      P.O. Box 600, New Zealand.